US1414340A - Bending machine - Google Patents

Description

F. C. CROWE. V

BENDING MACHINE. APPLICATION FILED APR.12, 1921.

Patented May 2, 1922,

, I 2 SHEETS-$HEET W k2 p H w, -a

. 4 w 6 1 M a9 am umber F. C. 'CROWE.

BENDING MACHINE.

APPLICATION mso APR. 12, 192'.

1,414,340. Patented Mai 2,1 22f f 4/ 4 w 7 #138. /0 45 /4 Z7 Z mm QF E Q FREDERICK o. onown, on LAKIMA, wnsnmeron, essreuon T0 VARIETY MAN-Urac- TUBING COMPANY, OF YAKI A, urn-summon.

Applicatibdfiled April 12',i92'1f. Serial no. 460,688.

T 0 aZZ whom it may coma-av Be'it known that I, FREDERICK (3.; Cnown;

a citizen of the United States, residing at Yakima, in YakimaCounty and State or 'Washington, have invented certain new and useful Improvements in- Bending Machrnes,

of which the following is a specification.

My present invention relates to improve ments 1n bending machines" adapted espe-' daily for the purpose of forming flanges in sheet metal blanks in the process-of forniing tubes; as stove pipes, or other tubular structures having' -a lon itudinal seam for locking the adjoiningedges in the completion of the pipe or tube. The primary object ofthe inventionis-the provision of a machine of this character that is comparatively simple in constructionand operation, durable, and lnexpenslve in cost of manufacture. To this end the 1nvent1on= involves certain novel combinations and arrangements of parts involving progressive sets of bending rollers forsuccessivel'y bending the edges of a sheet of metal preparatory to 1nterlocking the completed blank into tubular form, and in certain other novel features of construction as; Will be h'ereinafter more fully pointed out and claimed.

In the accompanying drawings I have illustrated one complete example 1015 the physical embodiment of my thus far devised for the practical application of the principles ofmy; inventlon. It

will be understood that the embodiment" shown may be changed and altered as desired Within the scope of my appended claims without departing from the splrit of my invention.

Figure 1 is a vlewin side elevation of a machine embodying my invention, with a portion of the frame at the near side of the 'section to di'solose the arrangement of parts. Figure: 4 is an end view of one of a-parrof guide dies or blocks tor'theedges of the sheet being bent in the machine.-

Figures 5', sand 7 show diagrammatically the three sets of progressive'bending rollers invention wherein the parts are combmed and arranged acc'ordmg to the best mode I have machine. ,7 I g Figure 8 sho-Wsthe' iconcav'ed and eonvexedfeed-rolls tolconform to the shapev-of the rolled pipe, s V I v The prefer complementary edges of a sheet metal plate that has previously been shaped to tubular form order topro-vi'd'e the necessary i nterlocking'flanges or bends that are subsequently laid or compressed into a seam, as

for instance in the formation of a stove pipe, and 'vvhile sheet metal may be bent in the machine for-other uses, for convenience of description; 'the'tube Will be referred" to here' indicated in Figures 6 and ings by -the' letter S. j v V, 3 The machine is supported on a main indicating their functions" :the bending .inafter as a stove pipe,- parts of Which are I 7 ofthedrawframefincluding the uprights 1,- I and topplates 2',"a'nd the frame Which is of suitable height and required strength; may be braced and fixed togetherin usual'or -\vell l'rn'o-vvn manner." The previously. bent" or shapednall-y extending edgesthat are to be bent or sheet of metal'is introduced-tdthe machine. presenting one end tot-he guide rollers 3', 4, and 5- with the complementary, -longitudrjj flanged-at the top,; the bodyof "the sheet-be:

ing pushed over, the horizontal, concave roller 5 and the two'freefledgesotthe sheet held or restrained' 'by the enlarged, upper ends of the tapered and concave rollers 3 and l which are disposed in perpendicular position to the roller 53 Thus the'three roll- I V ers guide the sheet of metal. to the machine by means ot which its longitudinal edges are flanged orjbent for subsequent interlocking.

One of the cross or top plates 2 is utilized to support the upper ends of the vertical guide rollersandf angle brackets 6' and 7 are utilized to support theloWerends of] these rollers," as Well as to support thezhorizontal roller 5'. mentary and are bolted to the inner facesof the uprightsl, 1 of'the tr ame,' and the three rollers are'adjustably supported each on a i i v pair of bearing-plates 8 *Which have journals The angle brackets are comple- 9 fixed therein, and the journals on: which the rollers are fixed, passthroughslots in" l;

' the cross' pla te Qand angled' brackets 6"'an'clf 7 respectively. p

The bearing plates which support the p red form of the invention at& illustrated ln the drawings isespecially" adapted for use in fianging or bending the 1 journals of the guide rollers are secured to the cross plate and angle brackets by bolts 10, and the supports for these plates have the scope of the slots and the springs 45'enthe bearings will keep the guide rolls adjusted to the lesser, limit, and provide a means whereby taper pipe may be handled and properly. guided. It w1ll thus be apparent that the vertical rollers are adjustable laterally'and the horizontal roller -is adjustable vertically in their supporting elements or members, and Wlll' automatlcally expand or separate as the diameter of the pipe increases. The metal bending machinery is compactly arranged and supported in a central- .housing 12 which extending longitudinally of the machine, projects for-ward between the two vertical guide rollers and backward a suitable distance therefrom to support the progressive bending mechanisms. The machine is preferably actuated from a driving gear 13 encased within the housing, the drivenpulley 14 and shaft 15. The driving shaft 15 passes transversely through the housing and carries the driving gear-13, and

the shaft is journaled in, bearings as at 16 on themain frame; The three sets of pro gressive ben'dingjrollers are designated respectivelylZ, l8 and 19, each set comprising twov pairs and the pairsv 0f the sets are locatedatthe respective sides and exterior of. the centrally located housing, thus per- 'mitting the complementary'edges, of the tubular sheet of metal to pass along at the respective sides of the housing'as thebend ing progresses.

The feed rolls and the sets of bending rollers are directly and positively operated from the driving gear 13 in the housing, the third set 19 having'apair of co-ac'ting gears 20 and 21; the second set 18.having co-act ing gears 22 and 23, both gear sets being drivenfrom the driving gear 13. The driving gear also operates an idle gear 24 which drives the gear set '25, 26 of the first set of bending rollers, and the gear 26 operates the idle gear 50 which drives the gear set 46,4? of the feed rolls. I The feed rolls which are used to convey the sheet. metal pipe are placed inv advance of the forming rolls to engage the sheet metal and pass it V on to the'forming' rolls and these feed rolls 7 have concave edges on the bottom set 49 and are convex on thetop set48 to substantially conformto the curvature of the sheet metal,

the direction of rotation being indicated by The'sheet arrows in Figure 1 where the gears are in} dicated by dotted lines.

Thus all the rollers are timed and synchronized to exert the same traction 01' fric tional engagement with the sheet metal passing through the machine, and the progressive bendingcrollers also form the, feed mechanism, operated from the driving shaft 5 15, for ehmlnatlng unequal stresses, and

preventing buckling of the metal sheet in its forward movement.

The first set of formingrollers as indicated in Figures 3 and 5 comprise a pair of upper, complementary double rollers 27;,27 H

and a complementary pair of flanged rollers 28,281 which co-act to form a vertical, up-. .wardly extending flange between rollers27 and 28 at the left in F igurer5, and a ver tical, downwardly extending flange between the reversely arranged rollers .27 and 28 at the right side of the figure, these'flanges being bent at right angles to :a linetangential i with the periphery of the tubebeing formed.

As the forward end of the sheet passes 1 through the first set of rollers the flanged edges encounter a guide block or die 29, one

attached at each exterior side of the housing in proper alinement to receive the flanged edges, and these blocks are fashioned with L-shaped slots 30 extending horizontally therethrouglnthe right hand guide block in Figure 4 being adapted to receive the downwardly extending flange, and the'left'hand j block having its slot shaped to receive the upwardlyextending flange at the left of the.

housing.

metal fed forward bythegflrst set of bending rollers, throughthej guide blocks 29 to the secondset, where a more acute angle is imparted to the flanges, as:

The second set of;

indicated in Figure 6.

bendingrollers include a pair of conical upper and lower rollers-81, 31 one at each I cemplementaryjpair of inner beveled rollers 32, and in conjunction with this set of rollers I employ a pair of rotary anvils in v the'form of a horizontally disposed conical roller 33, and an angularly CllSPOS6ClyCOX1lC-ll roller 34, at opposite sides of the housing and journaled in brackets secured to the housing. As the flanged edges of the metal sheet pass through these rollers, theflanges are bent in substantially the same plane, at acute anglesto the tangential line of the periphery of the tube being formed, as indicated at S in Figure 6.

The sheet is now being fed forward-by the tractive force of the two sets of -r ollers .17 and 18, andthe frontfend of'the sheet with its acutely formed flanges is introduced tothe third and'final set of bending rollers indicated as 19. This final set comprises a pair of upper and lower outwardly beveled rollers 35,35 and a complementary V side-of the housing, which co-act with the i the machine and the, edges flanged or bent to. the desired formation to permit subsequently interlocking of the flanges to formthe seam.

The shafts of the rollers are designated by the numeral 37, and some of these shafts may have adjustable hearings, to take up wear, and to afford-adjustment of the co-' acting rollers. Thus the housing may be slotted as at 88 to permit movement of the shafts, and the shafts of the upper rollers may be retained in adjustable bearing blocks 39 encased within the housing. These blocks may be adjusted as to their altitude by screw bars 40, and clamped in proper position by clamp nuts 41 bearing on the top surface of V V the housing.

After the seaming or bending machine has performed its functions as above descrlbed,

the tubular sheet with its properly formed flanges may be formed into a completed tube and the seam laid as before indicated.

To insure accurate and rapid feed ng of the sheet metal pipe a tapered feed guide 42 is mounted on the central housing 12 with its upper edge or face in a direct horizontal line with the forming rolls at the point where the upper and lower rolls meet and erected on this taper feed guide on the upper side thereof is awedge plate-43 to separate the longitudinal edges of thepipe to a width to correspond to the width of the housing thus spacmg the edges of the pipe so as to be properly received by the forming rolls; This guide may be made of varying sizes'to correspond With the Various sizes of pipe.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is 1. The combination with a longitudinally disposed central housing, a driving. pulley, shaft, and a driving gear on s'aidshaft encased in the housing, of feed rolls and progressive sets of bending rollers having transverse shafts in said housing and arinterposed rangedat the sides'of the housing, a gear set for eachroller set actuated from the driving gear, guide rollers, for introducing a sheet metal to the first roller set, and a feed guide for separating the edges of the sheet metal to be received'by the forming rolls, as described.

2. The combination with a longitudinally disposed central housing of guide rollers therein and operating means for said rollers .65 and progressive bending rollers supported within the housing, each set. of rollers comprising a pair of rollers at each side of the' f by oppositely extending flanges are. formed along the proximate edges'of a sheet of a housing arranged in inverted relation wheremetal, for the purpose. described.

3. The combination with a longitudinally disposed central housing, of p'rogressive bending rollers upported thereln .and 0Per- 7 i .ating means for said rollers within the housing, each set ,of rollers comprising a pair of rollersarranged ini'nverted order at op- 'posite sides of the "housing, one of said, sets having a. pair of co-ac'ting, .conical,"anvi l Y rollers, and means for operating said operating meanswhereby the sets of rollers are synchronously actuated, and an advance set,

of rollers tofeed'a metal sheet through said sets.

'said housing, gears on said shafts actuated 4. The combination with a longitudinally disposed central housing, a drive shaft, a drive pulley and a drive gear thereon en-y g from the driving gear, adjustable bearing blocks for some of said shafts within the rollers.

5. The combination in a metal bending machine with adjustable, concave ,{,guide between two sets of bendingrollers forming a circular space therebee a tween, of a central, longitudln'al houslng and a driving gear therein suitably actuated,

progressive sets of bending rollersanda set J of feed rollers at the sides of said housing and connections thereto from the driving gear, and means, for adjusting the bearings of some of said bending rollers, as de-- scribed.

In testimony whereof I afiix my signature.

FREDERICK o. ,CBOWE.

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